Role of free radicals in the binding of organochlorine pesticides and heavy metals with humic acid

Authors
Pandey, AK Pandey, SD Misra, V Viswanathan, PN
Citation
Ak. Pandey et al., Role of free radicals in the binding of organochlorine pesticides and heavy metals with humic acid, SCI TOTAL E, 231(2-3), 1999, pp. 125-133
Citations number
28
Categorie Soggetti
Environment/Ecology
Journal title
SCIENCE OF THE TOTAL ENVIRONMENT
ISSN journal
00489697 → ACNP
Volume
231
Issue
2-3
Year of publication
1999
Pages
125 - 133
Database
ISI
SICI code
0048-9697(19990701)231:2-3<125:ROFRIT>2.0.ZU;2-F
Abstract
The formation of soluble complexes between humic acid (HA) and gamma-HCH or different metals (Ca, Cr, Mn, Fe, Co, Ni, Cu, Zn,Pb, Cd, As and Mg) was st udied, along with any generation of free radicals by electron spin resonanc e spectroscopy. Free radical generation was noticed in case of interaction of humic acid with gamma-HCH, Cu and Cr. A hyperfine splitting pattern was noticed only in case of Mn. However, with Ca, Cd, Pb, As, Ni, Co, Zn and Fe , neither free radicals were generated nor hyperfine splitting was observed . The possible significance of free radicals in the binding of environmenta l pollutants with humic acid is discussed together with ecotoxicological im plications. (C) 1999 Elsevier Science B.V. All rights reserved.